Cooler for telephone instruments.



I pw. P. suNz. v COOLER FORTELEPHONE ENSTRUMENTS.

APPUCATION- FILED JULY 25, |'9l2. jggg@ 1 mmm July 6, 1915.

SHEETS-SHEET 1.

Vin SUNW.

Comm Fon TELEPHONE msnumms.

APFLICATON HLED JULY 25. i912. I

Pat-@Mad July 6, 1915.

2 SHEETS-SHEET 2.

narran erariale rarnur ernten.

y wrLLmMns'r-una or LaNsnowNn, MARYLAND, AssreNon, er MnsNn ASSIGNMENTS,

f liasses.

I Vloon yby a positively ing at Lansdowney,

sought to he clearly "ro man .wnzenrannriieerc'ronns COMPANY, aconronamrou or DELAWARE.

i soenna ron,

T all whom #may concern: y l, l

Be it known that l, VVILLTAM FRESTON SrUNZ, a 'citizen of the United States2 resid-y in the county of Baltimore and State of Maryland,have invented certain newA and useful, improvements 1n LCoolers for Telephonelnstruments; and` do declare the following to be a full, clear, and exact description of the invention, such as willv enable others skilled in the art to which it yappertainsto make and use the Asaine, reference being hadto the accompany f ing drawings,

4and to the letters and figures f V of reference ,marked thereon, which form a v'it part of this specification.

rMy invention relates to telephone instruments, and primarily to providing means for cooling 'or' keeping ,l granular carbon of -l f vide meansvto cover down the heat in the microphone telephonie instruments, and has for its object to propractically the whole area lof the surface neXt to the granular cariowing body of cooling agent so that the burning of the electrodes next' tothe granular carbon .will be pre *vented and maximum leliiciency in the current obtained. y

To the accomplishment of Ithe foregoing 'and such other objects as may hereinafter .3.0

lappear the'invention consists 1n the features hereinafter particularly described and then defined by the claims reference being had to the accompanying drawings, in which two forms of the invenagent; Fig.

ment of partitions tion are illustrated,`and in which:

parts of. a transmitter having a needle carrying arm and adapted for use in connection with records from which vibrations are taken by the transmi tter and electrically transferred to suitable receivers; Fig. 2 is a plan view of Fig, l, with a portion of the needle carrying arm broken away; Fig. 3 is a section on the line 3 3 of Fig. 4l through a portion of one of the carbon holding cells of a transmitter, showin the course of the flowing cooling agent; 1ig. l is an end view of Fig, 3 with a portion of one face ofthe cooling 'chamber broken 'away and illustrating the arrangein the chamber; Fig. 5 is a diagrammatic view illustrating an arrangement of cooling chambers with means for supplying and discharging the cooling 6 is a sectional view, full size, throughl a speaking telephone transmitter Specification of Letters Patent. Q

' granular 'rnLnrnoNE INSTRUMENTS.

illustrating the invention applied thereto; Fig'. 7 is a cross-sectional view through the receiver illustratedin Fig. (3; Fig. 8 is a detached detail view of one of the cooling chambers with portions broken away; and Fig. 9 is a diagrammatic view illustrating Patented July 6, 1915.

. application met .my 25, 1912. serial No'. 711,528.

the front and rear cooling chambers o two carbon cells with means for supplying and discharging the cooling agent.

In Figs. l to 5 the numeral 1 designates a multiplex transmitter, in this instance, comprising four' granular carbon cells 2 each containing a movable electrode 3, all of which electrodes are suitably connected to a vibratable frame 4 from which extends a vibration amplifying reducing lever 5 connected at its inner end to ,an arm 6 which carries a needle intended to contact with the record, said parts being laterally vibratable upon a suitable support 7, none of which parts howeverneed be further described as they do not constitute thepresent invention v In order to cool the granular carbon in the several cells, each cell is formed with a chamber 8 and providedv with an inlet 9 and an exit l0 for the cooling agent which may rloe water or other suitable cooling agent. lt

distributionof the within the chamber a lthe inlet will be directed to `opposite sides of the inlet opening and 'caused to flow in practically two streams inwardly and outwardly in opposite the inlet to the outlet of the chamber thus practically covering the entire area ofthe chamber by two merging bodies flowing from the inlet to the outlet and traveling in laterally opposite directions. IThis not only causes the entire area of the wall surface of the chamber to be covered by the flowing agent but also causes a more rapid and positive flow of the agent through vthe chamber so that the heat absorbed from the granular carbon is very rapidly carried olf and resulting in a moreeiiicient low temperature ofthe carbon so that more efficiency arranged in such mansol directions to each other from of current is obtained. The cooling agent is received from a suitable source into a manifold 12 from which a. number of branches 13, preferably of rubber or non-conducting material, lead to the inlets of the several chambers, one branch to each chamber, and the cooling agent passes from the chambers through a number of pipes 14 preferably oi rubber or non-conducting material, one from each chamber, and discharging into a manifold l5 from which the cooling agent passes to any suitable point. LBy such arrangement it will be observed thatany number of champlied at each side of each granular carbon cell instead of to only-one side as in Figs.

1 to 5. Each of these cooling chambers is' formed in the same Way as that illustrated in Figs. 3 and 4, and the cooling agent is supplied to each chamber from a manifold 17 through branches 18 and discharged from each chamber through branches 19 discharging into a manifold 20, the branches leading to and from the chambers being preferably of rubber or other non-conducting material. The operation of the cooler is the same in this form as in the first form. described the only diii'erence being that in the talking transmitter each granular carbon cell is provided with #two cooling chambers, one on each of its two faces, and the movable electrodes are connected to a diaphragm 21, and a speaking tube or mouth piece 22 is also provided.

1 have illustrated and described the preferred details of construction of the various parts but itis obvious that the cooling chamnit-ases bers formed as described may be applied to A in the opposite direction to that illustrated in the drawings and be embraced Within the c. invention.

Having described my invention and set forth its merits what ll claim is 1. 1n a telephonie instrument, a granular carbn chamber provided with a cooling chamber having partitions arranged to cause a cooling agent to flow in practically a plurality of streams through the chamber, each in a circuitous path.

2. n a telephonie instrument, a multiple of granular carbon chambers each `provided with a cooling chamber having partitions arranged to cause a cooling agent to dow in practically a plurality of streams through the chamber, each in a circuitous path, a supply manifold with branches leading therefrom to the multiple of chambers, one to each chamber, and branches leading from the chambers to a discharge manifold. v

3. In a telephone instrument, a plurality of granular carbon cells each having a centrally disposed movable electrode, a diaphragm with which the several movable electrodes are connected, a cooling chamber on the opposite sides of each granular car-1 bon cell, each cooling chamber being provided with partitions arranged to cause a cooling agent to flow in practically a plurality of streams through the'chamber, each in a circuitous path, means for supplying the cooling agent to each chamber, and means for discharging the agent from each chamber.

In testimony whereof l aliix my signature in presence of two Witnesses.

(l1-Lis. S. Hrm, WM. G. HENDERSON.

esl 

